How do I cook meth?

On day one of Hector: Rats, you need to cook up some meth while under attack from various forces. This is done by collecting a variety of ingredients from around the house and then interacting in some way with a laboratory setup on the top floor of the house.

What ingredients do I need to use, and in what order do I need to use them in order to cook meth?

In the event I pick multiple ingredients at once, how do I then choose which ingredient to use at the laboratory setup?